Even so, the TiO₂ nanoPER protocol offers a practical materials and manufacturing framework for high-index metasurfaces. Subject of Research: Direct printing of high-index optical metasurfaces using titanium dioxide nanoparticle-embedded resin and nanoimprint lithography. Article Title: Direct printing of metasurfaces using formulated optical materials. “Direct printing of metasurfaces using formulated optical materials.” https://doi.org/10.1038/s41596-026-01407-0Image Credits: AI GeneratedDOI: https://doi.org/10.1038/s41596-026-01407-0Keywords: Optical metasurfaces, nanoimprint lithography, nanoparticle-embedded resin, nanoPER, titanium dioxide nanoparticles, high-index materials, flexible photonics, integrated photonics, nanofabrication.